package com.xxxx.seckill.controller;

import com.xxxx.seckill.pojo.User;
import com.xxxx.seckill.service.IGoodsService;
import com.xxxx.seckill.service.IUserService;
import com.xxxx.seckill.vo.DetailVo;
import com.xxxx.seckill.vo.GoodsVo;
import com.xxxx.seckill.vo.RespBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.thymeleaf.context.WebContext;
import org.thymeleaf.spring5.view.ThymeleafViewResolver;
import org.thymeleaf.util.StringUtils;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;
import java.util.concurrent.TimeUnit;

/**
 * <p>
 * 商品接口 前端控制器
 * </p>
 *
 * @author heyanfeng
 * @since 2022-08-01
 */
@Controller
@RequestMapping("/goods")
public class GoodsController {
    @Autowired
    private IUserService userService;
    @Autowired
    private IGoodsService goodsService;
    @Autowired
    private RedisTemplate redisTemplate;
    @Resource
    private ThymeleafViewResolver thymeleafViewResolver;
    /**
     * @Author heyanfeng
     * @Description   跳转商品列表页面
     *
     *              优化1、 页面整个缓存前后端不分离
     *              优化2、
     * @Date 11:10 2022/8/1
     * @Param [session, model, ticket]
     * @return java.lang.String
     **/
    @RequestMapping(value ="/toList",produces = "text/html;charset = utf-8",method = RequestMethod.GET)
    @ResponseBody
    public String toList(Model model, User user,
                         HttpServletRequest request, HttpServletResponse response){

        //在此处进行页面的整个缓存，不单纯的进行页面跳转
        ValueOperations valueOperations = redisTemplate.opsForValue();
        String html = (String) valueOperations.get("goodsList");
        //Redis中获取页面，如果不为空，直接返回页面
        if(!StringUtils.isEmpty(html)){
              return html;
        }

        model.addAttribute("user",user);
        model.addAttribute("goodsList",goodsService.findGoodsVO());


        //如果为空则,手动渲染，存入Redis并返回
        WebContext webContext = new WebContext(request,response, request.getServletContext(),request.getLocale(),model.asMap());
        html = thymeleafViewResolver.getTemplateEngine().process("goodsList", webContext);
        if(!StringUtils.isEmpty(html)){
            valueOperations.set("goodsList",html,60, TimeUnit.SECONDS);
        }
        //v1 身份的验证和判空，
//        if (StringUtils.isEmpty(ticket)){
//            return "login";
//        }
//     //   User user = (User)session.getAttribute(ticket);
//        User user = userService.getUserByCookie(ticket, request, response);
//        if (null == user){
//            return "login";
//        }

//        return "goodsList";

        return html;
    }

    //优化1、全页面Redis缓存
//    @RequestMapping( value = "/toDetail/{goodsId}",produces = "text/html;charset=utf-8")
//    @ResponseBody
//    public String toDetail(Model model,User user,@PathVariable Long goodsId,
//                            HttpServletRequest request, HttpServletResponse response) {
//        ValueOperations valueOperations = redisTemplate.opsForValue();
//        String html = (String) valueOperations.get("goodsDetail:"+goodsId);
//        if(!StringUtils.isEmpty(html)){
//            return html;
//        }
//
//        model.addAttribute("user", user);
//        GoodsVo goodsVo = goodsService.findGoodsVOByGoodsId(goodsId);
//        Date startDate = goodsVo.getStartDate();
//        Date endDate = goodsVo.getEndDate();
//        Date nowDate = new Date();
//        //秒杀状态
//        int secKillStatus = 0;
//        int remainSeconds = 0;
//        //秒杀还未开始
//        if(nowDate.before(startDate)){
//            remainSeconds = ((int) ((startDate.getTime() - nowDate.getTime()) / 1000));
//        }else if(nowDate.after(endDate)){
//        //秒杀已结束
//            secKillStatus = 2;
//            remainSeconds = -1;
//        }else {
//            secKillStatus = 1;
//        }
//        model.addAttribute("remainSeconds",remainSeconds);
//        model.addAttribute("secKillStatus",secKillStatus);
//        model.addAttribute("goods",goodsVo);
//
//
//        WebContext webContext = new WebContext(request,response, request.getServletContext(),request.getLocale(),model.asMap());
//        html = thymeleafViewResolver.getTemplateEngine().process("goodsDetail", webContext);
//        if(!StringUtils.isEmpty(html)){
//            valueOperations.set("goodsDetail",html,60, TimeUnit.SECONDS);
//        }
//        return html;
//    }

    @RequestMapping(value = "/detail/{goodsId}", method = RequestMethod.GET)
    @ResponseBody
    public RespBean toDetail(User user, @PathVariable Long goodsId) {
        ValueOperations valueOperations = redisTemplate.opsForValue();
//        String html = (String) valueOperations.get("goodsDetail:" + goodsId);
//        if (!StringUtils.isEmpty(html)) {
//            return html;
//        }

//        model.addAttribute("user", user);
        GoodsVo goodsVo = goodsService.findGoodsVOByGoodsId(goodsId);
        Date startDate = goodsVo.getStartDate();
        Date endDate = goodsVo.getEndDate();
        Date nowDate = new Date();
        //秒杀状态
        int seckillStatus = 0;
        //秒杀倒计时
        int remainSeconds = 0;

        if (nowDate.before(startDate)) {
            //秒杀还未开始0
            remainSeconds = (int) ((startDate.getTime() - nowDate.getTime()) / 1000);
        } else if (nowDate.after(endDate)) {
            //秒杀已经结束
            seckillStatus = 2;
            remainSeconds = -1;
        } else {
            //秒杀进行中
            seckillStatus = 1;
            remainSeconds = 0;
        }
//        model.addAttribute("remainSeconds", remainSeconds);
//        model.addAttribute("goods", goodsVo);
//        model.addAttribute("seckillStatus", seckillStatus);

//        WebContext webContext = new WebContext(request, response, request.getServletContext(), request.getLocale(), model.asMap());
//        html = thymeleafViewResolver.getTemplateEngine().process("goodsDetail", webContext);
//        if (!StringUtils.isEmpty(html)) {
//            valueOperations.set("goodsDetail:" + goodsId, html, 60, TimeUnit.SECONDS);
//        }
        DetailVo detailVo = new DetailVo();
        detailVo.setUser(user);
        detailVo.setGoodsVo(goodsVo);
        detailVo.setRemainSeconds(remainSeconds);
        detailVo.setSecKillStatus(seckillStatus);
        return RespBean.success(detailVo);
    }
}
